A new 12km long section of A44 is announced to be opened on 2024-12-09 (
source).
B7 between A44's exit Waldkappel and A44's exit Ringgau was already removed from the latest toll tablee valid from Oct 1st. B27 was also removed from the toll table between its junction with B452 and A44's Ringgau exit. (see
here). I don't know the new dedication of the former B7 and B27 sections. B7 will likely be a state road but I don't know if L3334 or partially L3459. I've no idea about the B27 section.
I'll likely only open A44 in six weeks and keep the B road as-is till OSM will be updated (or I find any info e.g. on a field check).
https://travelmapping.net/hb/showroute.php?r=deuhe.a044hes&lat=51.120630&lon=9.959364&zoom=13